<?php

class PostController extends Controller
{
    public $layout='column2';

    /**
     * @var CActiveRecord the currently loaded data model instance.
     */
    private $_model;

    /**
     * @return array action filters
     */
    public function filters()
    {
        return array(
            'accessControl', // perform access control for CRUD operations
        );
    }
    /**
     * Specifies the access control rules.
     * This method is used by the 'accessControl' filter.
     * @return array access control rules
     */
    public function accessRules() {
        return array(
            array('allow',  // allow all users to access 'index' and 'view' actions.
                'actions'=>array('index','view'),
                'users'=>array('*'),
            ),
            array('allow', // allow authenticated users to access all actions
                'users'=>array('@'),
            ),
            array('deny',  // deny all users
                'users'=>array('*'),
            ),
        );
    }

    /**
     * Displays a particular model.
     */
    public function actionView() {
        $post=$this->loadModel();
        $comment=$this->newComment($post);

        $this->render('view',array(
            'model'=>$post,
            'comment'=>$comment,
        ));
    }

    /**
     * Creates a new model.
     * If creation is successful, the browser will be redirected to the 'view' page.
     */
    public function actionCreate() {
        $model = new Post;

        if(isset($_POST['Post'])) {
            $model->attributes=$_POST['Post'];

            if($model->save())
                $this->redirect(array('view','id'=>$model->id));
        }

        $this->render('create',array(
            'model' => $model,
        ));
    }

    /**
     * Updates a particular model.
     * If update is successful, the browser will be redirected to the 'view' page.
     */
    public function actionUpdate() {
        $model=$this->loadModel();

        if(isset($_POST['Post'])) {
            $model->attributes=$_POST['Post'];
            if($model->save())
                $this->redirect(array('view','id'=>$model->id));
        }

        $this->render('update',array(
            'model'=>$model,
        ));
    }

    /**
     * Deletes a particular model.
     * If deletion is successful, the browser will be redirected to the 'index' page.
     */
    public function actionDelete() {
        if(Yii::app()->request->isPostRequest) {
            // we only allow deletion via POST request
            $this->loadModel()->delete();

            // if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
            if(!isset($_GET['ajax']))
                $this->redirect(array('index'));
        }
        else
            throw new CHttpException(400,'Invalid request. Please do not repeat this request again.');
    }

    /**
     * Lists all models.
     */
    public function actionIndex() {
        //echo md5('huutuit'); die;
       // echo CPasswordHelper::hashPassword('huutuit'); die;
        $criteria = new CDbCriteria(array(
            'condition' => 'status='.Post::STATUS_PUBLISHED,
            'order'     => 'update_time DESC',
            'with'      => 'commentCount',
        ));

        if (isset($_GET['tag']))
            $criteria->addSearchCondition('tags',$_GET['tag']);

        $dataProvider=new CActiveDataProvider('Post', array(
            'pagination'=>array(
                'pageSize'=>Yii::app()->params['postsPerPage'],
            ),
            'criteria'=>$criteria,
        ));

        $this->render('index',array(
            'dataProvider'=>$dataProvider,
        ));
    }

    /**
     * Manages all models.
     */
    public function actionAdmin() {
        $model=new Post('search');

        if (isset($_GET['Post']))
            $model->attributes=$_GET['Post'];
        $this->render('admin',array(
            'model'=>$model,
        ));
    }

    /**
     * Suggests tags based on the current user input.
     * This is called via AJAX when the user is entering the tags input.
     */
    public function actionSuggestTags() {
        if (isset($_GET['q']) && ($keyword=trim($_GET['q']))!=='') {
            $tags=Tag::model()->suggestTags($keyword);
            if ($tags!==array())
                echo implode("\n",$tags);
        }
    }

    /**
     * Returns the data model based on the primary key given in the GET variable.
     * If the data model is not found, an HTTP exception will be raised.
     */
    public function loadModel() {
        if ($this->_model===null) {
            if (isset($_GET['id'])) {
                if(Yii::app()->user->isGuest)
                    $condition='status='.Post::STATUS_PUBLISHED.' OR status='.Post::STATUS_ARCHIVED;
                else
                    $condition='';
                $this->_model=Post::model()->findByPk($_GET['id'], $condition);
            }

            if ($this->_model===null)
                throw new CHttpException(404,'The requested page does not exist.');
        }

        return $this->_model;
    }

    /**
     * Creates a new comment.
     * This method attempts to create a new comment based on the user input.
     * If the comment is successfully created, the browser will be redirected
     * to show the created comment.
     * @param Post the post that the new comment belongs to
     * @return Comment the comment instance
     */
    protected function newComment($post) {
        $comment=new Comment;

        if (isset($_POST['ajax']) && $_POST['ajax']==='comment-form') {
            echo CActiveForm::validate($comment);
            Yii::app()->end();
        }

        if (isset($_POST['Comment'])) {
            $comment->attributes=$_POST['Comment'];

            if ($post->addComment($comment)) {
                if ($comment->status==Comment::STATUS_PENDING)
                    Yii::app()->user->setFlash('commentSubmitted','Thank you for your comment. Your comment will be posted once it is approved.');
                $this->refresh();
            }
        }

        return $comment;
    }
}
